Sunken I90 Bridge / South Day Street Park is a shore dive in Lake Washington. Typically, visibility here is about 13 ft (range 5–20 ft), based on 15 pnwdiving reports from 2022 through 2026. For the site briefing, see dive planning for Sunken I90 Bridge.
Site Resources & Tools
Recent Visibility Reports
Dive report for 4/19/26
- Visibility
- A snowy 5-10 feet, <5 feet in the shallows (high tide)
Went for my first Exploration dive on the sunken bridge structure. Entry was on a bright, sunny morning, but light dropped off rapidly, with essentially no sunlight penetration below ~30 ft. We followed the orange guideline from 35 ft to 65 ft. Visibility became very limited at depth, and we lost the line. Shortly after, we made contact with the wreck structure. Given the low visibility and loss of the line, we made a conservative call to turn the dive at that point. Found 6–7 small fish (unidentified, sheltering within the structure), One small crab-like creature, Lots of metallic debris/garbage scattered around the wreck.
Dive report for 2/6/26
- Visibility
- A hazy 10 feet
Pretty murky in the lake today. Nearly complete darkness below 60ft. An entirely enjoyable swim however 👌
Nice! You probably saw a crawdad